题目

It’s generally considered that being named as Time’s Person of the Year is a(n)           of one’s success.     A．recognition  B．realization  C．contribution D．achievement 答案：A 解析: 略已知△ABC中，AB=AC，现将△ABC折叠，使点A、B两点重合,折痕所在的直线与直线AC的夹角为40°，则∠B的度数为______°．